I'm working on a site and it's doing that annoying thing where it looks totally fine on Mac (Safari + Chrome), but in Opera it randomly shifts a few layout sections. And the weird part is, when I tweak it to fix Opera, it ends up slightly off again on Mac.

On the page https://cost4estimating.com/ I can reproduce it clearly in the mid sections where the columns don't stay aligned consistently.

Feels like I’m stuck in this loop of fixing one browser and breaking the other

Has anyone run into Opera behaving differently with flex/grid stuff across macOS vs other setups?